captioning funded by cbs and ford-- built for the road ahead. >> kroft: on tuesday, voters will elect a new congress, replacing one that's had the lowest approval ratings in the history of political polling. we wanted to know what democratic majority leader harry reid and republican minority leader mitch mcconnell had to say about the level of dysfunction and deadlock they preside over. they call each other good friends, and showed up in the same uniform, but they were clearly playing for opposing teams. you don't think that people are upset about the fact that both of you can't get together and accomplish things? >> i think they're upset about... >> kroft: i think that's one of the reasons right now why your ratings are so low. >> safer: david mccullough is in love with american history, from its struggling birth to its soaring achievements. so in these last hours before tuesday's election, in this season of uncertainty, we thought it might be useful to reflect a little with mccullough on history and how the current presidential campaign stacks up. >> the shame of it is, the shame of